I never pictured myself doing anything *remotely* like the F45 Challenge. Like most perfectionists, I can’t stand to be bad at anything new. So when, years ago at my first-ever HIIT class, a mean ...

This article originally appeared on Jason’s blog. This article could stop there, but I’d like to give you a few more parameters and share a few 30-day challenge ideas you can do if you don’t have any ...

It's no secret we love trying out a fitness challenge at Women's Health. There is the 12-3-30, the 25-7-2, the walking challenge and the formidable (or quite frankly terrifying) 75 Hard Challenge.